James roland worthington



- J.' R. WORTHINGTON TELEGRAPHIC RECEIVING APPARATUS Filed Nov. 17, 1923Patented I Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

JAMES ROLAND WORTHINGTON, OF EAST CROYIDON, ENGLAND, ASSTGNOR TO SAIDWORTHINGTON AND CREED 5c COMPANY LIMITED, 01E CROYDON, ENGLAND.

TELEGRAPHIC RECEIVING APPARATUS.

Application filed November 17, 1923, Serial No. 675,333, and in GreatBritain November 27, 1922.

This invention relates to telegraphic receiving apparatus of the kind,known cornmercially as anundulator, comprising a s1- phon recordercarried by a polarized armature arranged vertically between the upperand lower pairs of poles of two vertically arranged electro-magnets thewindings of which are traversed by the electric signals the nature ofwhichis to be recorded by the siphon recorder on an endw'ays movabletape, one end of'the siphon recorder dipping into a verticallyadjustable ink receptacle. The present invention has for its object toimprove the construction and working of such telegraphic receivingapparatus and to enable adjustment of parts thereof to be made in aquick and effective manner to suit requirements.

To enable the polarized armature to be readily-held normally with anydesired force in any desired position between. the pairs of polesbetween which it extends, there is fixed to the spindle extending fromthe upper end of the armature, a lever arm to the free end of which areconnected the adjacent ends of two oppositely arranged coiled-springsthe other ends of which are connected to two levers, adapted to be movedapart, so as to strain the springs, by an adjustable screw actingagainst other parts of the levers. To enable the plane of the polarizedarmature in relation to the faces of the pairs of poles that normallyobtains to be readily adjusted, so as to impart a bias to the armatureto suit the signals received, the levers connected by springs to thearmature and the adjusting screw associated therewith, are carried by a.support that is cap-able of being adjusted laterally, as by a set screw,against the action of a spring.

Armature adjusting means of the kind described can be variouslyconstructed.

In the accompanying illustrative drawings, Figs, 1 and 2 are elevationsat'right angles to one another and Fig. 3 a plan, with parts removed,showing apparatus of the kind referred to embodying the presentinvention. Fig. 4 is a horizontal section on the line IV-TV of Fig. 1.

Referring to these drawings, A and B are the vertically arrangedelectro-magnets between the upper and lower pairs of poles A B and A Bof which the vertically arranged polarized armature C is mountedoscillate about a-vertical axis in the usual way.

The armature adjusting means according to the present invention,comprises, as hereinbefore stated, two levers a, b connected throughcoiled springs 0, c to a lever arm d fixed to the spindle e of thearmature C. The levers a and b, in the example shown, consist of twoflat bent arms arranged in the same horizontal'plane as the lever arm (Zand pivoted at a b to a laterally movable support f, their longer armsbeing connected to the springs c, c and their other and shorter arms a 6extending towards one another and terminating near together. 9 is anadjusting screw mounted on the support f and arranged to bear againstthe adjacent ends of the arms 41?, 19 so that by suitable adjustment ofthe screw, the force with which the armature is normally held inposition can be varied to suit requirement. The support f is carried bythe upper end [L of an upwardly extendinglever arm h pivoted at k to a,lug 2 or extension carried by a base plate is, to which the pair ofvertical electro-magnets A and B are fixed at their lower ends. Thelever arm h is connected by a spring a to'a pin n fixed to a verticalsupport 0 extending upward from the base plate 70, the said lever armbeing adapted to be moved against the action of the spring by a setscrew p extending through a bearing 29 carried by the said verticalsupport 0.

7' is the ink receptacle for the siphon recorder T which is fulcrumed,as usual, in a V shaped bearing e at the top of the armature spindle 6.One end of the siphon r corder dips into the ink receptacle and theother end bears against a tape 1 which is supported by a platen 0 and isdrawn forward by feed wheels 1", in the usual manner. The receptacle,which may be, of circular shape, as shown, is carried by a vertical rack8 arranged to slide in a vertical groove 6 formed inthe said verticalsupport 0 and to be raised and lowered by a toothed pinion'u,

fixed on a horizontal spindle o journalled inv the said support 0. Thespindle r is preferably journalled, as shown, in one of the side wallsof the vertical groove t between the outer side of which and a knob 12on the spindle o is interposed a spring washer w, or a. coiled spring,that normally holds the pinion it against the opposite side of the walland in gear with the rack s. The opposite wall of the groove if isformed with an aperture w through which the pinion a with its spindle Q)can be pushed, when assembling the parts for use. y is a hood carried bythe upwardly ext-ending lever h and covering part of the mechanismdescribed.

The vertical support 0 may advantageously be cast, as shown, in onepiece with the base plate 72 which, as usual, is adapted to be pivotedat one end at to a table or other.

support 1 to admit of its adjustmenttoward and from the tape feedingmechanism by an adjustable screw 2. To the base plate are attached thenecessary terminals 2 for the electromagnets A and B. I

The tape feeding mechanism, which. is or may be of known kind, may bedriven as usual heretofore, from an electric or other motor throughmechanism of the friction type comprising a friction disc against whichrevolves a friction .wheel adapted to be moved across the face of thewheel to obtain a variable speed.

What I claim is:

1. ln telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus, ofsprings acting in opposition upon said armature to hold it in a definiteposition, separate movable anchorage points for the extremities of saidopposed springs remote from the armature and adjusting means, operableby interdependent simultaneous separation or approximation of saidmovable anchorage points to vary the action of said opposed springs onsaid armature.

2. In telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus, ofsprings acting in opposition upon said armature to hold it in a definiteposi tion, separate movableanchoragc points for the extremities of saidopposed springs remote from the armature and adjusting means adaptedsimultaneously to approximate one of the opposed spring anchorages tothe arnature while withdrawing the other spring anchorage therefrom.

3. In telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus of a leverconnected to said armature, springs adapted to act in oppositedirections against said lever, other levers adapted to act upon saidsprings and adjusting means adapted to vary the positions of the lastmentioned levers and the action of said springs on the first mentionedlever.

4. In telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus of a leverconnected to said armature, spring controlledmeans adapted to act onsaid lever and hold it and said armature in position, a support for saidspring controlled means and means whereby said support and springcontrolled means can be adjusted laterally and the plane of thepolarized armature in relation to the faces of the pairs of magnet polesbetween which it extends, readily adjusted.

5. In telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus of a leverconnected to said armature, adjustable spring means adapted to act onsaid lever and hold it and said armature in position, a support for saidspring controlled means and means whereby said support and springcontrolled means can be adjusted laterally and the plane of thepolarized armature in relation to the faces of the pairs of magnet polesbetween which it extends, readily adjusted.

6. In telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus of a leverconnected to said armature, oppositely arranged coiled springs connectedat one end to said lever arm, two bent horizon tal levers connected tothe other ends of said springs, a laterally movable support for saidbent levers and adjusting means carried by said support and adapted tovary the position of said bent levers and the action of said springs onthe lever connected to said armature.

7. In telegraphic receiving apparatusv of the kind herein referred to,the combination with the polarized armature of such apparatus of a leverconnected to said armature, spring controlled means adapted to act onsaid lever and hold it and said armature in position, a laterallymovable support for said spring controlled means, a spring controlledlever connected to said support and means for varying the position ofsaid lever and support and thereby the position of the plane of thearmature in relation to the pole faces of said magnets.

8. Telegraphic receiving apparatus of the kind herein referred to,wherein there is connected to the polarized armature of such apparatus,a lever the free end of which is connected to the adjacent ends of twooppositely arranged coiled springs the other ends of which are connectedto the two levers adapted to be moved apart, so as to strain thesprings, by an adjustable screw acting against other parts of thelevers, substantially as described for the purpose set forth.

9. Telegraphic receiving apparatus according to claim 8, wherein thelevers connected by springs to the polarized armature and the adjustingscrew associated therewith,- are carried by a support that is capable ofbeing adjusted laterally against the action of a spring, so as" toenable the plane of the polarized armature in relation to the faces ofthe pairs of magnet poles between which it extends to be readilyadjusted, substantially as described for the purpose set forth.

10. Telegraphic receiving apparatus ac cording to claim 8, wherein thelevers connected through the coiled springs to the lever arm fixed tothe armature spindle, consist of two flat bent arms that are arranged inthe same horizontal plane as the lever arm fixed to the armaturespindle, and are pivoted to a laterally movable support, the arms of thelevers opposite to those to which the springs are connected extendingtowards one another and the adjusting screw being mounted on the samemovable support and arranged to act against the adjacent ends of thelast mentioned arms, substantially as described.

11. In telegraphic receiving apparatus of the kind herein referred to,the combination with the polarized armature of such apparatus of a leverarm connected to said armature, a laterally movable support, oppositelyarranged levers pivoted to said support,

port and an adjusting screw adapted to move the last mentioned lever armwith its attached parts against the action of its spring.

12. In telegraphic receiving apparatus of the kind referred to, thecombination with the polarized armature of such apparatus v of a leverfixed rigidly to said armature so as to pivot therewith, springsarranged to act in opposite directions against said lever and adjustingmeans adapted to vary the action of said springs on said lever bysimultaneous movement in a path transverse to said lever of the endsofthe springs remote therefrom.

Signed at London, this 1st day of November,1923.

JAMES ROLAND VVORTHINGTON.

